arch/s390/include/asm/chpid.h

   1 /*
   2  *    Copyright IBM Corp. 2007, 2012
   3  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   4  */
   5 #ifndef _ASM_S390_CHPID_H
   6 #define _ASM_S390_CHPID_H
   7
   8 #include <uapi/asm/chpid.h>
   9 #include <asm/cio.h>
  10
  11 struct channel_path_desc {
  12         u8 flags;
  13         u8 lsn;
  14         u8 desc;
  15         u8 chpid;
  16         u8 swla;
  17         u8 zeroes;
  18         u8 chla;
  19         u8 chpp;
  20 } __packed;
  21
  22 static inline void chp_id_init(struct chp_id *chpid)
  23 {
  24         memset(chpid, 0, sizeof(struct chp_id));
  25 }
  26
  27 static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
  28 {
  29         return (a->id == b->id) && (a->cssid == b->cssid);
  30 }
  31
  32 static inline void chp_id_next(struct chp_id *chpid)
  33 {
  34         if (chpid->id < __MAX_CHPID)
  35                 chpid->id++;
  36         else {
  37                 chpid->id = 0;
  38                 chpid->cssid++;
  39         }
  40 }
  41
  42 static inline int chp_id_is_valid(struct chp_id *chpid)
  43 {
  44         return (chpid->cssid <= __MAX_CSSID);
  45 }
  46
  47
  48 #define chp_id_for_each(c) \
  49         for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
  50 #endif /* _ASM_S390_CHPID_H */